Still need a bit more advice

[wings]

#6 Today, 09:28 AM
wings
Forum Newbie Join Date: Dec 2007
Posts: 2


Thanks guys- A little more issue

--------------------------------------------------------------------------------

I did order the ituura catalog already and did see the shim kit. The biggest issue with trying to make the wheels coplanar is that the lower wheel is tilted slightly back toward the frame. I'll try and clarify: The top wheel being positioned straight up and down has both the top and bottom edges of the wheel coplanar with the BOTTOM ONLY of the lower wheel. The top of the lower wheel is tilted slightly back toward the frame. If I shim the top wheel the prooblem is augmented. If I shim the bottom wheel the tilt still exist.

Any suggestions on how to determine if the Chinese drilled the arbor hole straight through the wheel hub. My thought is that the lower wheel's arbor hole is not drilled correctly through the hub and has a tilt bias.
Thanks for everyones help.

Wings

[LCHIEN]

#6 Today, 09:28 AM
wings
Forum Newbie Join Date: Dec 2007
Posts: 2


Thanks guys- A little more issue

--------------------------------------------------------------------------------

I did order the ituura catalog already and did see the shim kit. The biggest issue with trying to make the wheels coplanar is that the lower wheel is tilted slightly back toward the frame. I'll try and clarify: The top wheel being positioned straight up and down has both the top and bottom edges of the wheel coplanar with the BOTTOM ONLY of the lower wheel. The top of the lower wheel is tilted slightly back toward the frame. If I shim the top wheel the prooblem is augmented. If I shim the bottom wheel the tilt still exist.

Any suggestions on how to determine if the Chinese drilled the arbor hole straight through the wheel hub. My thought is that the lower wheel's arbor hole is not drilled correctly through the hub and has a tilt bias.
Thanks for everyones help.

Wings

IIRC, those kind of bandsaw usually the bottom wheel is fixed, but the top wheel can be adjusted for both tilt and in-out depth allowing you to line it up coplanar.

[Hoover]

IIRC, those kind of bandsaw usually the bottom wheel is fixed, but the top wheel can be adjusted for both tilt and in-out depth allowing you to line it up coplanar.

#6 Today, 09:28 AM
wings
Forum Newbie Join Date: Dec 2007
Posts: 2


Thanks guys- A little more issue

--------------------------------------------------------------------------------



Any suggestions on how to determine if the Chinese drilled the arbor hole straight through the wheel hub. My thought is that the lower wheel's arbor hole is not drilled correctly through the hub and has a tilt bias.
Thanks for everyones help.

Wings

Install or make a tapered shim to correct the angle.

[LarryG]

Any suggestions on how to determine if the Chinese drilled the arbor hole straight through the wheel hub. My thought is that the lower wheel's arbor hole is not drilled correctly through the hub and has a tilt bias.

Unless I'm misinterpreting you, it can't be that. If the hub hole was skewed, the wheel would wobble as it rotates. Any tilt that existed at the bottom would move to the top when you rotated the wheel 180deg.

It sounds to me like you need to install a shim washer behind the bottom wheel, to move it out on its axle, and then adjust the tilt of the top wheel as required to make the two wheels coplanar.

[LarryG]

Here's a sketch illustrating what I'm talking about in my previous post:



Understand that the angles shown are highly exaggerated, for illustration purposes.

As an alternative to shimming the bottom wheel out, it might be possible to remove washers from behind the top wheel to move it in and thereby accomplish the same thing.

One additional thought ... you wrote, "The top wheel being positioned straight up and down ..." -- if by that you mean you're checking it for plumb with a level, that's not necessary. It doesn't matter if the wheels are out of plumb (within reason, of course) as long as they're coplanar.

[wings]

Larry,

Your message was spot on. Your diagram shows the problem exactly. Thank you for your expert help. I will add shims to the lower wheel.

Thanks again for your excellent post.

A much happier Wings.